Improvement in sights for fire-arms



T. DUNSTONE.

Sights for Fire-Arms.

No.158,577. PatentedJan.12,1875.

Inventor Vitnesses PATENT OFFICE.-

THOMAS .DUXSTOXI'I, 01* sANTt-k CRUZ, CALIFORXIA.

IMPROVEMENT IN SIGHTS F OR FlRE-ARMS.

Specification forming part of Letters Patent No. 158,577, dated January 1'2, 1875;

applieation filed November 28, 157;.

improvement without further invention or experiment.

My invention relates to an improvement in the trout sight for rifles, by whieh I. am enabled to substitute one of two different kinds ot sights for the other at short notiee and with little trouble.

My invention eonsists in mounting the two sights upon eonvt'mient sides of a sleeve, which is titted to turn about the trout-end ot' thebarrel, and either sight. can then bebronght to the top of the barrel, when the sleeve may be seeured by a set'serew.

.ltet'erring to the aeeompanying drawings tor a more complete explanation of my invention, Figure l is a perspeetive view ot' my deviee. Fig. 2 alongitudinal seetion ot' a barrel, showing the attaehment ot' the screw and sights. p

' A is the section of a ritlebarrel nearest the muzzle. The barrel is turned round and somewhat smaller for a. short distance t'rom the muzzle, and the sleeve l3 is titted aeeurately' to this-part A. nut, (l, is titted upon the end of the ri'tlebarrel to hold the sleeve in place, and the sleeve and nut are both of a size to tinish the barrel out nieely. Upon opposite sides or, if desired, at right angles with eaeh other upon the rotating sleeve, 1 tix the sights l) and E in any ordinary manner of seeuring sueh sights. The sights most in use are the open sight for hunting, and the globe-sight 'l'ot.ta.1get purposes, or any more accurate shooting. Either of these sights may be brought to the top of the lnu'rel by simply turning the sleeve, and they can be accurately adjusted by a gage or mark, al'ter which the sleeve may be secured by means of a setserew, 1.

By this means I am enabled to provide a simple and easy method ot' ehanging sights whenever desired. In muzxledmuling rilles, whieh carry a 'ramrod, the sights would have to be set at right angles to eaeh other, but in breeel|-lo:ulers they eould be placed opposite one another, and in this ease I employ a guard, U, below the barrel to proteet the sight not in use.

This guard being serewed to the barrel, and also to the nut, may serve to keep the latter t'rom eoming oil".

in making the sleeve it may be t'ound advantageous to eonstruet it and the. shading ring or thimble ot' the bunt-sight in one pieee, and the sight may then be set in from the top, as shown at l ig. .l, or by boring through the bottom ol' the ring it. may be set in the usual manner, it pret'erred.

For n-iilitary and all light-barreled guns at re-ent'oreing pieee may be set. over the muzzle ot' the gun to receive the rotating sleeve, and it can be set back far enough to allow the use ot" a bayonet, when neeessary.

.llaving thus deseribed my invention, what I elaim, and desire to secure by Letters lat ent, is I .1. The eylindrieal rotating earrier or sleeve 13, provided with one or more sights, .l) and 1C, and eonstrueted to operate substantially as and tor the purpose herein described.

2. The guard U and the set-screw l in eombination with the rotating sleeve B and sights l) and l), substantially as herein described.

In witness whereof I hereunto set my hand and seal.

THOMAS 1) L XSTOXE.

Witnesses:

\Ynmimr H. TALBOT, Jens MAnANNn Y.

[L. sl 

